RED Based Congestion Control Mechanism for Internet Traffic at Routers

Abstract

This paper begins with a brief literature review of various approaches to congestion avoidance and control of Internet traffic. It focuses mainly on one of Active Queue Management (AQM) schemes known as Random Early Detection (RED) mechanism for congestion control at routers. Towards the end of paper, an approximate analytical performance model has been proposed based on standard RED mechanism as an effective congestion control technique. Methodology adopted is based on Principle of Maximum Entropy (ME) to model RED mechanism. To model the bursty input traffic, Generalized Exponential (GE) distribution has been used. Closed form expressions for the state and blocking probabilities have also been presented. Numerical examples have been presented. By comparing results obtained from ME (Analytical Model) and Simulation in QNAP-2 [22], it validates the credibility of ME solution.